Multislope PI Modeling and Feedforward Compensation for Piezoelectric Beam. (11th May 2020)

• Record Type: Journal Article
• Authors: Xu, Ming; Zhang, Jia-qi; Rong, Cheng; Ni, Jing
• Other Names: Samborski Sylwester Academic Editor.
• Is Part Of: Mathematical problems in engineering. Volume 2020(2020)
• Publication Date: 2020-05-11
• Subjects: Engineering mathematics -- Periodicals; 510.2462
• DOI: 10.1155/2020/6404971
• Languages: English
• ISSNs: 1024-123X

Abstract

Abstract : The hysteresis nonlinearity greatly reduces the tracking precision of piezoceramic actuators for expected displacement in a high-accuracy positioning system. In order to effectively compensate the hysteresis for piezoelectric ceramics, a novel modeling method, namely, multislope PI (Prandtl–Ishlinskii) was proposed. In view of the minimum mean square error (MSE) criterion, the weights of an improved PI model were identified by the quadratic programming optimization algorithm. For verifying the accuracy of the proposed multislope PI hysteresis model, a feedforward compensation control for piezoceramic beam was achieved. The corresponding experimental system was established, and the displacement tracking experiments were carried out. The results indicated that the mean tracking error was 0.2828 μ m and within 1% of full scale, as well as the MSE was 0.3100 μ m. Compared with the conventional PI model, the proposed multislope PI model demonstrated a significant improvement in positioning performance for the piezoceramic beam.